Make sure your yum.conf looks something like this: root@layer001 [~]# cat /etc/yum.conf [main] exclude=courier* apache* mod_ssl* httpd* perl mysql* php* spamassassin* exim* cachedir=/var/cache/yum debuglevel=2 logfile=/var/log/yum.log pkgpolicy=newest distroverpkg=centos-release tolerant=1 exactarch=1 retries=20 obsoletes=1 gpgcheck=1 # PUT YOUR REPOS HERE OR IN separate files named file.repo # in /etc/yum.repos.d root@layer001 [~]# Code (markup): More... Read FULL tutorial